use read_token;
use range::Range;
use std::rc::Rc;
use {
DebugId,
MetaData,
ParseError,
ParseResult,
Tokenizer,
TokenizerState,
};
#[derive(Clone)]
pub struct Text {
pub allow_empty: bool,
pub property: Option<Rc<String>>,
pub debug_id: DebugId,
}
impl Text {
pub fn parse(
&self,
tokenizer: &mut Tokenizer,
state: &TokenizerState,
chars: &[char],
offset: usize
) -> ParseResult<TokenizerState> {
if let Some(range) = read_token::string(chars, offset) {
if !self.allow_empty && range.length == 2 {
Err((range, ParseError::EmptyTextNotAllowed(self.debug_id)))
} else {
match read_token::parse_string(
chars, offset, range.next_offset()) {
Err(err) => Err((err.range(),
ParseError::ParseStringError(err, self.debug_id))),
Ok(text) => {
if let Some(ref property) = self.property {
Ok((range, tokenizer.data(
MetaData::String(property.clone(), text),
state,
range
), None))
} else {
Ok((range, state.clone(), None))
}
}
}
}
} else {
Err((Range::new(offset, 0),
ParseError::ExpectedText(self.debug_id)))
}
}
}
#[cfg(test)]
mod tests {
use super::super::*;
use range::Range;
use std::rc::Rc;
#[test]
fn expected_text() {
let text = "23";
let chars: Vec<char> = text.chars().collect();
let mut tokenizer = Tokenizer::new();
let s = TokenizerState::new();
let text = Text {
debug_id: 0,
allow_empty: true,
property: None
};
let res = text.parse(&mut tokenizer, &s, &chars, 0);
assert_eq!(res, Err((Range::new(0, 0), ParseError::ExpectedText(0))));
}
#[test]
fn empty_string() {
let text = "\"\"";
let chars: Vec<char> = text.chars().collect();
let mut tokenizer = Tokenizer::new();
let s = TokenizerState::new();
let text = Text {
debug_id: 0,
allow_empty: false,
property: None
};
let res = text.parse(&mut tokenizer, &s, &chars, 0);
assert_eq!(res, Err((Range::new(0, 2),
ParseError::EmptyTextNotAllowed(0))));
}
#[test]
fn successful() {
let text = "foo \"hello\"";
let chars: Vec<char> = text.chars().collect();
let mut tokenizer = Tokenizer::new();
let s = TokenizerState::new();
let foo: Rc<String> = Rc::new("foo".into());
let text = Text {
debug_id: 0,
allow_empty: true,
property: Some(foo.clone())
};
let res = text.parse(&mut tokenizer, &s, &chars[4..], 4);
assert_eq!(res, Ok((Range::new(4, 7), TokenizerState(1), None)));
assert_eq!(tokenizer.tokens.len(), 1);
assert_eq!(&tokenizer.tokens[0].1,
&MetaData::String(foo.clone(), "hello".into()));
}
}